Dry-kiln.



A. H. SIMMS.

DRY K'ILN..

(No Model.)

(Application led Feb1 28,

Patented July 3|. |900.

2 Sheets-Sheet L we News Perns oo.. Puo'mumo., msn-Immun. u, c

Nh. y655,|23.\- Patented July 3|, |9ou. A. H. slmMs.

DRY KILN.

(Applicaion med Feb. 2a, 1900.;

l(No Model.) 2 shuts-snm 2 rra STATESV PATENT rrrcnr.

Jn'RY-KILN.

. Y Application led February 28, 1900. Serial No. 6,877.1 (No model.)

ToaZZ whom it may concern? y Be it known that-L- ALoNzo HENRY SiMMs, a citizen of the United States of America, residing at Birmingham,`in the county of J efferson and State of Alabama, have invented certain new and useful Improvements in Dry- Kilns for Lumber and Brick, of which the following is 'a specification.

My invention relates to an improvement in dry-kilns for lumber and brick.

The object of this invention is to provide improved means for drying lumber and brick by the use of steam through a system of radiating-pipes and air circulation through cold-air ducts and hotiair ventilators; and to this end I regard as of theutmost importance the following rst, the method of fastening the forward end of mainheader-pipe stationary and permanently with a headlock and eyebolts and mounting the remainder of this pipe upon concaved rollers, so as to allow for contraction aud expansion under different degrees of heat and cold, and, second, the arrangement of the cold-air ducts into three distinct compartments, with corresponding hot-air exits, all so adjusted as to ventilato any portion of the kiln where needed most or all portions simultaneously.

With the foregoing in view my invention consists in certain features of construction and combination of parts, which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figurelis a transverse vertical section of myimprovedkiln. same. Fig. 3 is an enlarged detail in end elevation of the cold-air iiues and connected.

parts, and Fig. 4 is an enlarged detail in longitudinal section of one end of pipe a.

The heating system consists of a main or central header a a, preferably of extra heavy wrought-iron pipe coupled together and of the desired length. This header is drilled with two rows of holes on each side converging outward and slightly upward. Into these holes are screwed the radiating-pipes l) b, the outer ends of which are closed or capped over. This entire heating system is mounted on one iron head-block with eyebolts at its upper end at c and iron concave rollers which turn freely in chair-supports CZ d. By this Aas first half.

,charge into trap i.

Fig. 2 is a longitudinal section of the system of mounting the diculties arising from expansion and contraction are coinpletely overcome, as the entire system is free to expand and contract upon the rollers, as above described. The head-block at c secures this end of the large pipe permanently, thus forcing `the expansion upon the rollers. The steam enters through pipe and valve at e,

- thus iilling the entire heating system.

Upon the extreme end of main pipe is iitted an eccentric cap f---thatv is, a dischargecap the outlet of which is on a line with the `bottom of main a. By this means all the water of condensation will be discharged Without accumulation in main et to prevent obstructing free circulation of steam in radiating-pipes o o. In long systems (eighty feet and incre) an intermediate discharge-opening is putin at g, the object of which is to carry olf all condensation in the first half of system through an independent pipe h. This insures dry steam in lower half of system the same At'the extreme end of kiln all drain-pipes come together, as shown, and dis- At the point j, Fig. 2, the discharge-pipe is extended upward to Z,

Where a T isused, separating the supply-pipe right and left into branches 7c 7c 7e upward at sides of kiln, thence inward and over headceiling to a point m far along to the front andconverging to center of ceiling. These pipes are closed at extreme end at'm and are lperforated with holes full length of ceilingpipes. This system of pipes serves as a fireextinguisher, and by opening the stop-valve at n the contents, both steam and water, is discharged in kiln-room through perforated Vpipes 7c. By opening valve o the entire system is thoroughly drained.

The proper circulation of coldV andhot air is found to be of the greatest importance in drying both lumber and brick. My system in this regard is very superior, and I wish to callparticular attention to it.

The' cold-air inlet preferably runs longitudinally through center of kiln-room and directly underneath the main header-pipe, thus making it impossible for air to getto the lumber or bricks above without iirstpassing through the radiating-pipes and being heated. This cold-air iiue is divided into three independent compartments, as shown byp, q, and

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nearly so.

r, closed at their inner end and each having an independent door or shutter s s s. The top flue communicates with the first third of kiln through its slotted open top, as shown by the arrows at o", the middleV fine with the middle third, and the bottom line with the last third, of kiln. By this means it is evident that any portion of the kiln can be given a cold-air draft entirely independent ofother portions. The hot-air or vapor exits v o v are located in the side walls of the kiln near the ceiling, each having a Hap damper to be opened and closed by r0d,'as shown at e' in Fig. l.

In operation it is evident that if it is desirable to thoroughly ventilat'e the rear end of kiln shown at w w by opening air-flue p, and also opening the two hot-air outlets directly over this portion of the kiln, a strong current of air will be established through p upward through heating system and out at the ventilators, while the remaining portion of the kiln will still be dormant or4 very These same conditions can be established in any other portion of the kiln by the same methods.

The timbers Z ZZ Z subserve the double purpose of supporting the chairs and expansion rollers, which carry the entire heating system, and also a frame in which the cold-air hues are built up.

It is evident that slight changes might be resorted to in form andarrangementv of the several parts described without departing from the spirit and scope of my invention, and hence I do not Wish to limit myself to the exact construction herein set forth; but,

l. Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is* l. In a kiln, the combination with a heating-pipe, of a cold-air fine beneath the pipe,

Vsaid flue subdivided into two or more independent ChamberS, these chambers superim-A posed one above the other and extending successively one beyond another.

2. In a kiln, the combination with a main header-pipe carrying a series of `radiatingpipes, of a cold-air [lue beneath the header, said iiue subdivided into two or more independent chambers, these chambers superimposed one above another and extending suc- I cessvely one beyond another.

3. In a kiln, the combination with a header carrying aseries of radiating-pipes and mounted or supported throughout its length upon antifriction-bearings, of bolts hookedl over certain of the radiating-pipes for securely fastening the header in place at that point while vexpansion and contraction takes place throughout the remainder of the length of the header upon the antifriction-bearings of -the air-supply thereinto.

Y `5i The combination with a suitable support, of a header thereon, said header carrying ra` diating-pipes, andi eyeb'olts secured to certain of the radiating-pipes for securing the header at one end uponits support, and rollers upon which the header rests. j Y 1 6. In a kiln, the combination with a main header pipe and radiating pipes extending therefrom, of cold-air ducts extending from a common point divided into separate compartments for dischargingat diiierent points immediately beneath said header-pipe,valves for these compartments and hotair dampers at the upper end of the kiln for the discharge of heated air therefrom. 1

'7. In a kiln, the combination with amain header-pipe, of cold-air ducts extending in proximity thereto, said ducts of varying lengths and perforated for the escape of air, and extending to a commonl point, and valves for the outer ends of these ducts.

8. In a kiln, the combination with a header wholly located within the kiln and supported upon antifriction bearings throughout its length, and sets of inclining, diverging radiating-pipes extending from each side of the header-pipe which balance the latter axially upon the bearings, of means located at one end for rigidly securing it inl place, and a steam-pipe passing from the exterior into the kiln and discharging into the header in close proximity to the point where the header is secured, `whereby no strain is felt uponthe wall of the kiln due to expansion and `contraction of the header.

Intestimony whereof I have signed my name to this specification in the presence ,of two subscribing witnesses. l

' ALONZO HENRY SIMMS.

In presence of- JOHN W. PERKINS, THos. SIMMS. v

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